This is an interesting point.
I guess we are born as we are born with our instincts, for example we never need to be taught to protect what we have, thats an instinct as is mating, other wise we weould not be here now. we are taught moral values by society in general, via parents, teachers (the police if you are naughty) and through the interaction with others. We learn from an early age that violence is not acceptable (yet we all had the odd punch up in the school playground).
I think we are born with instincts that society tries to subdue, this is a constant battle, some people are too "instintive" and generaly end up in prison.